diff --git a/inc/contrib/Twig/Extensions/Extension/Tinyboard.php b/inc/contrib/Twig/Extensions/Extension/Tinyboard.php
index 49db4046..5748c0d3 100644
--- a/inc/contrib/Twig/Extensions/Extension/Tinyboard.php
+++ b/inc/contrib/Twig/Extensions/Extension/Tinyboard.php
@@ -72,7 +72,7 @@ function twig_sprintf_filter( $value, $var) {
 }
 
 function twig_truncate_filter($value, $length = 30, $preserve = false, $separator = '…') {
-	if (strlen($value) > $length) {
+	if (mb_strlen($value) > $length) {
 		if ($preserve) {
 			if (false !== ($breakpoint = strpos($value, ' ', $length))) {
 				$length = $breakpoint;
diff --git a/inc/functions.php b/inc/functions.php
index 3a5e0ecf..7dcdc088 100644
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -7,7 +7,8 @@
 	
 	require 'contrib/gettext/gettext.inc';
 	
-	register_shutdown_function('fatal_error_handler'); 
+	register_shutdown_function('fatal_error_handler');
+	mb_internal_encoding('UTF-8');
 	loadConfig();
 	
 	function loadConfig() {
diff --git a/mod.php b/mod.php
index 5822e3b5..970586b0 100644
--- a/mod.php
+++ b/mod.php
@@ -1360,10 +1360,10 @@
 				// Bug fix for https://github.com/savetheinternet/Tinyboard/issues/21
 				$po->body = truncate($po->body, $po->link(), $config['body_truncate'] - substr_count($append_html, '<br/>'));
 				
-				if(strlen($po->body) + strlen($append_html) > $config['body_truncate_char']) {
+				if(mb_strlen($po->body) + mb_strlen($append_html) > $config['body_truncate_char']) {
 					// still too long. temporarily increase limit in the config
 					$__old_body_truncate_char = $config['body_truncate_char'];
-					$config['body_truncate_char'] = strlen($po->body) + strlen($append_html);
+					$config['body_truncate_char'] = mb_strlen($po->body) + mb_strlen($append_html);
 				}
 				
 				$po->body .= $append_html;
@@ -1731,7 +1731,7 @@
 							if(empty($value))
 								$value = '<em>empty</em>';
 							else
-								$value = '<span style="color:maroon;">' . utf8tohtml(substr($value, 0, 110) . (strlen($value) > 110 ? '&hellip;' : '')) . '</span>';
+								$value = '<span style="color:maroon;">' . utf8tohtml(substr($value, 0, 110) . (mb_strlen($value) > 110 ? '&hellip;' : '')) . '</span>';
 						} elseif(gettype($value) == 'integer') {
 							$value = '<span style="color:black;">' . $value . '</span>';
 						}
@@ -1787,11 +1787,11 @@
 					error(sprintf($config['error']['required'], 'title'));
 				
 				// Check string lengths
-				if(strlen($b['uri']) > 8)
+				if(mb_strlen($b['uri']) > 8)
 					error(sprintf($config['error']['toolong'], 'URI'));
-				if(strlen($b['title']) > 20)
+				if(mb_strlen($b['title']) > 20)
 					error(sprintf($config['error']['toolong'], 'title'));
-				if(strlen($b['subtitle']) > 40)
+				if(mb_strlen($b['subtitle']) > 40)
 					error(sprintf($config['error']['toolong'], 'subtitle'));
 				
 				if(!preg_match('/^\w+$/', $b['uri']))
diff --git a/post.php b/post.php
index 352cbdb8..a91b6530 100644
--- a/post.php
+++ b/post.php
@@ -323,11 +323,16 @@
 		}
 		
 		// Check string lengths
-		if(strlen($post['name']) > 50) error(sprintf($config['error']['toolong'], 'name'));			
-		if(strlen($post['email']) > 40) error(sprintf($config['error']['toolong'], 'email'));
-		if(strlen($post['subject']) > 100) error(sprintf($config['error']['toolong'], 'subject'));
-		if(!$mod && strlen($post['body']) > $config['max_body']) error($config['error']['toolong_body']);
-		if(strlen($post['password']) > 20) error(sprintf($config['error']['toolong'], 'password'));
+		if(mb_strlen($post['name']) > 35)
+			error(sprintf($config['error']['toolong'], 'name'));	
+		if(mb_strlen($post['email']) > 40)
+			error(sprintf($config['error']['toolong'], 'email'));
+		if(mb_strlen($post['subject']) > 100)
+			error(sprintf($config['error']['toolong'], 'subject'));
+		if(!$mod && mb_strlen($post['body']) > $config['max_body'])
+			error($config['error']['toolong_body']);
+		if(mb_strlen($post['password']) > 20)
+			error(sprintf($config['error']['toolong'], 'password'));
 		
 		wordfilters($post['body']);
 		
@@ -550,9 +555,9 @@
 		
 		// Remove DIR_* before inserting them into the database.
 		if($post['has_file']) {
-			$post['file'] = substr_replace($post['file'], '', 0, strlen($board['dir'] . $config['dir']['img']));
+			$post['file'] = substr_replace($post['file'], '', 0, mb_strlen($board['dir'] . $config['dir']['img']));
 			if($is_an_image && $post['thumb'] != 'spoiler')
-				$post['thumb'] = substr_replace($post['thumb'], '', 0, strlen($board['dir'] . $config['dir']['thumb']));
+				$post['thumb'] = substr_replace($post['thumb'], '', 0, mb_strlen($board['dir'] . $config['dir']['thumb']));
 		}
 		
 		$id = post($post, $OP);